APP下载

基于无线ZigBee技术的电厂疏水阀门内漏在线监测

2016-11-05马军衡薛明华戴坤鹏

能源研究与信息 2016年2期

马军衡+薛明华+戴坤鹏

摘要:开发了基于无线ZigBee技术的电厂疏水阀门内漏在线监测系统.利用传热原理,建立了电厂阀门泄漏量定量计算方法,搭建了一套基于Zigbee技术的热电偶温度采集装置,实现了疏水阀前、后温度无线数据采集.该系统能直观方便地显示出机组运行中疏水阀前、后温度变化及各个阀门泄漏量数据.该阀门内漏在线监测系统具有施工成本较低、在线实时测量等优势,可以为电厂运行人员提供疏水阀门检修、检漏的依据和参考.

关键词:疏水阀门; 内漏; 在线监测; 无线采集

中图分类号: TK 268 文献标志码: A

Abstract:Online monitoring system of the trap internal leakage in the power plant based on wireless ZigBee technology was developed.In this paper,trap leakage was calculated according to heat transfer theory.In order to reach the goal of wireless temperature acquisition before and after the traps,thermocouple system was setup based on wireless ZigBee technology.The temperature and trap leakage would be displayed with the advantages of noninvasion,online,realtime,lowcost.The trap leakage monitoring system presented in this paper could provide the references of trap checking for the operators in the power plant.

Keywords:trap; internal leakage; online monitoring; wireless acquisition

疏水阀门是电厂中不可缺少的流体控制设备,其作用是排除蒸汽管道中的蒸汽凝结水. 疏水阀门内漏不仅造成电厂汽水损失,增加了发电成本,而且会给电厂运行带来安全隐患.文献[1]中显示,对于300 MW机组,当高压旁路前疏水门泄漏1 t·h-1时,机组供电煤耗上升0.42 g·(kW·h)-1.

综合以往经验与文献[2-3],电厂疏水阀门内漏的原因可能有:① 疏水阀门存在质量问题:随着电厂蒸汽参数(温度、压力)的不断提高,疏水阀门的温度、压力耐受性能也要随之加强.倘若阀门存在材质较差、热处理较低等质量问题,一旦面临高温高压介质的冲击,极易产生内漏.② 疏水阀门关闭不及时:汽机启动时,没有及时关闭疏水阀门,高温高压蒸汽冲击疏水阀门密封面,使得密封面产生磨损,同时介质通过阀门时产生汽蚀,同样可对阀门造成危害.③ 疏水阀门开关过猛或者关……

登录APP查看全文